/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
'use strict'

// Task service
angular.module('flowableApp').service('TaskService', [
  '$http',
  '$q',
  '$rootScope',
  'RelatedContentService',
  function($http, $q, $rootScope, RelatedContentService) {
    var httpAsPromise = function(options) {
      var deferred = $q.defer()
      $http(options)
        .success(function(response, status, headers, config) {
          deferred.resolve(response)
        })
        .error(function(response, status, headers, config) {
          deferred.reject(response)
        })
      return deferred.promise
    }

    this.getProcessInstanceTasks = function(processInstanceId, isCompleted) {
      var data = {
        processInstanceId: processInstanceId
      }

      if (isCompleted) {
        data.state = 'completed'
      }

      return httpAsPromise({
        method: 'POST',
        url: FLOWABLE.CONFIG.contextRoot + '/app/rest/query/tasks',
        data: data
      })
    }

    this.getCaseInstanceTasks = function(caseInstanceId, isCompleted) {
      var data = {
        caseInstanceId: caseInstanceId
      }

      if (isCompleted) {
        data.state = 'completed'
      }

      return httpAsPromise({
        method: 'POST',
        url: FLOWABLE.CONFIG.contextRoot + '/app/rest/query/tasks',
        data: data
      })
    }

    this.involveUserInTask = function(userId, taskId) {
      var involveData = {
        userId: userId
      }

      var promise = httpAsPromise({
        method: 'PUT',
        url: FLOWABLE.CONFIG.contextRoot + '/app/rest/tasks/' + taskId + '/action/involve',
        data: involveData
      })

      return promise
    }

    this.involveUserInTaskByEmail = function(email, taskId) {
      var involveData = {
        email: email
      }

      var promise = httpAsPromise({
        method: 'PUT',
        url: FLOWABLE.CONFIG.contextRoot + '/app/rest/tasks/' + taskId + '/action/involve',
        data: involveData
      })

      return promise
    }

    this.removeInvolvedUserInTask = function(user, taskId) {
      var removeInvolvedData = {}
      if (user.id !== null && user.id !== undefined) {
        removeInvolvedData.userId = user.id
      } else {
        removeInvolvedData.email = user.email
      }

      var promise = httpAsPromise({
        method: 'PUT',
        url: FLOWABLE.CONFIG.contextRoot + '/app/rest/tasks/' + taskId + '/action/remove-involved',
        data: removeInvolvedData
      })

      return promise
    }

    this.queryTasks = function(data) {
      return httpAsPromise({
        method: 'POST',
        url: FLOWABLE.CONFIG.contextRoot + '/app/rest/query/tasks',
        data: data
      })
    }

    /**
     * Simple completion of a task without submitting form-data.
     */
    this.completeTask = function(taskId) {
      var deferred = $q.defer()
      $http({
        method: 'PUT',
        url: FLOWABLE.CONFIG.contextRoot + '/app/rest/tasks/' + taskId + '/action/complete'
      })
        .success(function(response, status, headers, config) {
          $rootScope.$broadcast('task-completed', { taskId: taskId })
          deferred.resolve(response)
        })
        .error(function(response, status, headers, config) {
          $rootScope.addAlert(response.message, 'error')
          deferred.reject(response)
        })

      var promise = deferred.promise
      return promise
    }

    this.claimTask = function(taskId) {
      var promise = httpAsPromise({
        method: 'PUT',
        url: FLOWABLE.CONFIG.contextRoot + '/app/rest/tasks/' + taskId + '/action/claim'
      })

      return promise
    }

    this.getRelatedContent = function(taskId) {
      var deferred = $q.defer()
      $http({
        method: 'GET',
        url: FLOWABLE.CONFIG.contextRoot + '/app/rest/tasks/' + taskId + '/content'
      })
        .success(function(response, status, headers, config) {
          // Add raw URL property to all content
          if (response && response.data) {
            for (var i = 0; i < response.data.length; i++) {
              RelatedContentService.addUrlToContent(response.data[i])
            }
          }
          deferred.resolve(response)
        })
        .error(function(response, status, headers, config) {
          deferred.reject(response)
        })
      return deferred.promise
    }

    /*
     * Get all subTasks for a task
     */
    this.getSubTasks = function(taskId) {
      var deferred = $q.defer()

      $http({
        method: 'GET',
        url: FLOWABLE.CONFIG.contextRoot + '/app/rest/tasks/' + taskId + '/subtasks',
        params: { latestFirst: true }
      })
        .success(function(response, status, headers, config) {
          deferred.resolve(response)
        })
        .error(function(response, status, headers, config) {
          deferred.reject(response)
        })

      return deferred.promise
    }

    this.assignTask = function(taskId, userId) {
      var assignData = {
        assignee: userId
      }

      var promise = httpAsPromise({
        method: 'PUT',
        url: FLOWABLE.CONFIG.contextRoot + '/app/rest/tasks/' + taskId + '/action/assign',
        data: assignData
      })

      return promise
    }

    this.assignTaskByEmail = function(taskId, email) {
      var promise = httpAsPromise({
        method: 'PUT',
        url: FLOWABLE.CONFIG.contextRoot + '/app/rest/tasks/' + taskId + '/action/assign',
        data: { email: email }
      })

      return promise
    }

    this.updateTask = function(taskId, data) {
      return httpAsPromise({
        method: 'PUT',
        url: FLOWABLE.CONFIG.contextRoot + '/app/rest/tasks/' + taskId,
        data: data
      })
    }

    this.createTask = function(taskData) {
      var deferred = $q.defer()
      $http({
        method: 'POST',
        url: FLOWABLE.CONFIG.contextRoot + '/app/rest/tasks',
        data: taskData
      })
        .success(function(response, status, headers, config) {
          $rootScope.$broadcast('new-task-created', response)
          deferred.resolve(response)
        })
        .error(function(response, status, headers, config) {
          $rootScope.addAlert(response.message, 'error')
          deferred.reject(response)
        })

      var promise = deferred.promise
      return promise
    }
  }
])
